Check the setting of your liftgate height. You can set the liftgate to open to any height, and yours may have been set low inadvertently. The instructions to set the liftgate height are in the owners manual:
Setting the Liftgate Open Height
1. Open the liftgate.
2. Stop the liftgate movement by pressing
the control button on the liftgate when
it reaches the desired height.
Note: Once the liftgate has stopped
moving, you can also manually move it to
the desired height.
3. Press and hold the liftgate control
button on the liftgate until you hear a
chime, indicating programming is
complete.
Note: You can only use the liftgate control
button to program the height.
Note: You cannot program the height if the
liftgate position is too low.
The new open liftgate height is recalled
when the power liftgate is opened. To
change the programmed height, repeat the
above procedure. Once you open the
power liftgate, you can manually move it
to a different height.
Note: The system recalls the new
programmed height until you reprogram it,
even if you disconnect the battery.
When operating the power liftgate after
you have programmed a lower height than
fully open, you can fully open the liftgate
by manually pushing it upward to the
maximum open position.